Accept multiple calls not working on a haunted phone ¯\_(ツ)_/¯

[acontreras]

3CX
Hosted on Amazon
Version 18.0 (Build 418)
Remote office connected by SBC Build Version 18.1.36


Phones
GrandStream GXP2170
Firmware Version 1.0.11.35

Inbound route to a ring group, ring all.

We have enabled second incoming call on the system

multiple incoming calls​

Settings --> Parameters
ALLOWUSEBUSYOPTFORGROUP = 1


One phone in the office don't ring on the second incoming call.

We did some troubleshooting.

I reset the device to factory defaults and re provision
Re download the firmware on the device (from 3cx.com/support/phone-firmwares)
We erase and generate the extension
Compare all settings vs other working devices (device has Accept multiple calls enabled)
network cable, ports, working fine, no packet drops.

Still we have the same phone not working, other 5 phones working as expected.

We can make and receive one call at a time, no problem.

Any advice or tip welcome
Thanks to all

 

[PanagiotisL_3CX]

Hello @acontreras

Multiple calls are intended only for direct calls to extensions and not for Ring Groups or Queues. We would strongly advise to revert the value of the specific parameter back to 0, as it is unsupported and other issues may occur.

 

[acontreras]

Hi,

I cannot take a need out of a costumer, neither I can change their expectations after using product for 3 years.

If anyone in the community wants to add some ideas, I'll appreciate it.

Thanks

 

[acontreras]

Now is working,

For anyone who find this ticket. We did nothing to solve it, it's working by itself now.